On Tuesday, 7 April 2020 06:56:04 BST Dale wrote: > J. Roeleveld wrote: > > On Tuesday, April 7, 2020 5:54:25 AM CEST Ian Zimmerman wrote: > >> On 2020-04-06 22:14, Dale wrote: > >>> I have DSL and it isn't to fast to begin with. At > >>> times tho, I'm only getting about 20 or 30% of what I should. > >> > >> Are you often on the phone at those times? May it be poor filtering? > >> > >> At my last residence - also "in the sticks", LOL - we had to give up on > >> DSL completely, because 6 times out of 10 when we got a phone call the > >> internet dropped. Seriously. We're not proud to support the Comcast > >> monopoly, but what a difference. > > > > This is likely caused by NOT having a filter for every device. > > > > Longer version: > > > > DSL requires a splitter/filter between the wall-socket (where the phone > > normally plugs in) and the DSL modem. It also has a 2nd connection for the > > phone. > > > > This filter needs to be installed between ALL phone-wall-sockets and any > > device plugged in. > > > > (Alternatively, you place the filter at the main entry-point and connect > > the router from that filter and run the "phone" port to the rest of the > > house.) > The phone part has been cut off for a long time. The only wire left is > the one to the modem itself. I forgot but I ran a brand new wire a good > while back when I moved the jack. This is a long term issue tho. I > might add, the DSL box up the road is full. The only way a new person > can get DSL is if someone else cuts theirs off. It's been full since > about three months after they installed the DSL box. I actually have > some extra filters tho. Since I don't have any use for them anymore. lol > > It was a good thought tho. I had a filter go bad once and it did wreak > havoc on the DSL. Poor internet, DSL signal lost at times. If the > phone rang or anyone picked up a phone, dead DSL for sure. > > Dale > > :-) :-)
Removing/reducing unneeded internal telephone wiring and placing the modem as close as possible to the drop wire when it enters the house, is the best way to reduce noise on the line and be able to sync at higher speeds. Getting the telecom provider to test the copper wire connections for high resistance faults between your house and the telephone exchange, is another approach to getting a higher ADSL sync speed. It is unlikely privatised monopoly suppliers will get out of bed to do this on your request, no matter how much subsidy they pocket from the government supposedly to improve their infrastructure. However, the problem you are describing is only related to poor wiring and copper telephone circuit faults if the modem reports dropped connections to the exchange. If the modem remains connected without suddenly re-syncing with the exchange at lower speeds, but your downloads from the Internet reduce all the same, then the problem is one of an over-subscribed ADSL line. Many ISPs tend to seek profit maximisation by over-subscribing their limited capacity infrastructure to more and more customers. The contention ratio becomes too high if all customers suddenly start downloading 4K UHD videos from the Internet at the same time every evening, while using an infrastructure which was designed before the Internet was invented. It used to be the case kids would return from school, go on the Internet and hammer youtube video downloads. So just before dinner time the Internet grinds to halt, only to pick up again speed later at night, until early in the morning. In countries with free market competition (OK, don't laugh) there should be other ISPs available, who for a price will be able to offer you an ADSL service with a lower contention ratio. Usually they sell these packages to business customers and of course charge more for the privilege. In the last couple of weeks, in many countries around the world there has been a lockdown to reduce the spread of the Coronavirus and many people who can, now work from home. This has increased the amount of videoconferencing and consequently the already burdened infrastructure is further constrained. However, this would cause a reduction in speeds during the day, than in the evening and it would be cause by upstream capacity getting exhausted, rather than what your ISP has provisioned your local exchange with. A final point to note: Bufferbloat. On assymetric DSL the achievable downstream speed is limited by the capacity/ load on the upstream path. Setting up traffic-shaping on your router on the upstream path will allow you to saturate the upstream and therefore maximise whatever downstream rate your line can deliver. You can read more about it here: https://www.linksysinfo.org/index.php?threads/qos-tutorial.68795/
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